?? ?????3.46?????????????????????
????:1???????:??????????
2????????????
3???????????
4????????????
5?????????
?????(6??????19?)?,???
??3.46?????????????,??,
?????????????????????????7??(??)2.13????????,????????,??????????????;
????????????????????????????????????????????????4???????????????????(??)0.69???????,?,??,???????????????????????????????,????;
???????2?????0.64????,??????????,????????????????
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